Re: Exclusions in V6

*To*: mathgroup at smc.vnet.net*Subject*: [mg78373] Re: [mg78275] Exclusions in V6*From*: Murray Eisenberg <murray at math.umass.edu>*Date*: Fri, 29 Jun 2007 05:49:46 -0400 (EDT)*Organization*: Mathematics & Statistics, Univ. of Mass./Amherst*References*: <200706270931.FAA01400@smc.vnet.net>*Reply-to*: murray at math.umass.edu

From a June 20 message from ulises at WRI: "the reason for this [failure to find the Tan exclusions automatically] is a technical one, but we expect to extend the Automatic handling in future releases." David Park wrote: > The new Exclusions option in V6 is quite nice. > > The following works: > > Plot[Tan[x], {x, -3 \[Pi], 3 \[Pi]}, Exclusions -> Cos[x] == 0] > > However, in view of the Exclusions Help page: > > "Exclusions -> Automatic excludes all subregions where discontinuities are > found in functions being plotted. The discontinuities can involve either > finite or infinite jumps in function values." > > I don't understand why the following fails. > > Plot[Tan[x], {x, -3 \[Pi], 3 \[Pi]}, Exclusions -> Automatic] > > -- Murray Eisenberg murray at math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower phone 413 549-1020 (H) University of Massachusetts 413 545-2859 (W) 710 North Pleasant Street fax 413 545-1801 Amherst, MA 01003-9305

**References**:**Exclusions in V6***From:*"David Park" <djmpark@comcast.net>